Get Ready with H12-831-ENU Exam Dumps (2023)
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NEW QUESTION 209
If the display current-configuration can reveal the IS-IS configuration, but there is no IS-IS configuration in the display saved-configuration, then the explanation?
- A. No IS-IS command entered
- B. IS-IS configuration running in memory, not saved to Flash
- C. The running IS-IS configuration in memory has been saved to Flash
- D. Flash running IS-IS configuration, not saved to memory
Answer: B
NEW QUESTION 210
In the network shown in the figure below, if a remote LDP session between SWA and SWC is to be realized, which of the following statement is correct?
- A. You need to create a remote peer and specify the lsr-id of the peer
- B. Need to configure the direct connection interface to establish a TCP connection
- C. It is not necessary to specify the lsr-id of the correct peer
- D. The configuration in the figure can already be implemented
Answer: A
NEW QUESTION 211
In order to advertise IPv6 routes in BGP4+, what fields are added in Update?
- A. A new path attribute: MP_REACH NLRI
- B. A new path attribute: AP_UNREACH_NLRI
- C. A new NLRI type, IPv6 NLR
- D. A new path attribute: IPV6_REACH_NLRI
Answer: A
NEW QUESTION 212
Which descriptions about the MPLS forwarding mechanism are correct? (Multiple choice)
- A. If the Tunnel ID value is not 0x0
- B. If the Tunnel ID value is 0x0
- C. When an IP packet enters the MRLS domain, the first thing to look at is the FIB table
- D. The system automatically assigns an ID to the upper-layer application using the tunnel
Answer: C,D
NEW QUESTION 213
The network administrator A wants to use the IP Prefix List to match a specific route entry. Which of the following routes will be matched by the IP Prefix List in the figure? (Multiple choice)
- A. 10.0.2.0/24
- B. 10.0.1.0/24
- C. 10.0.0.0/24
- D. 10.0.0.1/30
Answer: C,D
NEW QUESTION 214
Regarding the difference between NSR and NSF, which is correct?
- A. Both NSR and NSF require neighbor routers to complete
- B. NSF must rely on neighbor routers to complete
- C. NSF does not require neighbor routers to complete
- D. NSR must rely on neighbor routers to complete
Answer: B
NEW QUESTION 215
For the same MAC address, manually configured MAC entries have higher priority than automatically generated entries.
- A. False
- B. True
Answer: B
NEW QUESTION 216
In MPLS VPNE, in order to distinguish IPV4 prefixes that use the same address space, the IPV4 address is increased by the RD value. Which of the following description is correct? (Multiple choice)
- A. RD can be used to control the publication of VPN routing information
- B. RD is encapsulated in the Update message as an extended community of BGP during the delivery process
- C. After the PE receives the IPv4 route from the CE, it adds RD to the IPv4 route to convert it into a globally unique VPN-IPv4 route, and publishes it on the public network
- D. On a PE device, each VPN instance corresponds to an RD value. On the same PE device, the RD value must be unique.
Answer: B,D
NEW QUESTION 217
IS-IS supports multiple instances and multiple processes, that is, one IS-IS router, multiple VPN instances can be configured to be associated with multiple IS-IS processes. Which of the following descriptions about IS-IS multi-instance and multi-process are correct? (Multiple choice)
- A. 1 VPN instance can be associated with multiple different IS-IS processes
- B. If an IS-IS router creates multiple IS-IS processes, each process does not affect each other and is independent of each other
- C. 1 IS-IS process can be associated with multiple different VPN instances
- D. One IS-IS process can only be associated with one VPN instance
Answer: A,B,D
NEW QUESTION 218
DHCP Snooping is a DHCP security feature that can be used to defend against a variety of attacks, including ( ). (Multiple choice)
- A. Defense against man-in-the-middle attacks and IP/MAC Spoofing attacks
- B. Defense against DHCP spoofing attacks
- C. Defense against TCP flag attacks
- D. Defense against starvation attacks that change the CHADOR value
Answer: A,B,D
NEW QUESTION 219
Different virtual machines can use the VTEP tunnel established by vswitchi to communicate with VXLAN. Then the communication process of VXLAN is: 1 The source VTEP encapsulates the ARP broadcast sent by the source VM into a multicast packet and sends it to the L3 network. 2 After receiving the multicast packet, the destination VTEP learns the mapping relationship between the source VM and VTEP, and forwards the multicast packet to the local VM. 3 Local unicast response. 4 The destination VTEP encapsulates the Vxlan tunnel, establishes a mapping table and encapsulates it, and then unicasts it to the source VTEP. 5 The source VTEP receives the response and establishes the mapping relationship between the target VM and the target VEP, removes the tunnel and forwards it to the source VM. 6 The source VM and the target VM communicate unicast packets through the tunnel.
- A. 1-3-2-4-6-5
- B. 1-5-6-4-3-2
- C. 3-5-2-4-1-3
- D. 1-2-3-4-5-6
Answer: D
NEW QUESTION 220
An engineer uses 2 routers to test the IPV6 service, and runs the BGP4+ module to communicate with the branch. As shown in the figure, an engineer captures packets to view the Update message sent by R1. Which of the following statements is true about the description of the message information? (Multiple choice)
- A. This packet describes the currently withdrawn IPv6 route
- B. The next hop address of the route described in this packet is: 2001
- C. The maximum length before the routing address described in this packet is: 2001
- D. Only one BGP attribute is described in this packet: multi-protocol unreachable NLRI attribute
Answer: A,C,D
NEW QUESTION 221
The dynamic IP address assigned to the client by the DHCP server. Usually there is a certain rental period, which of the following description of the rental period is wrong?
- A. If the "rebinding timer" expires, but the client has not received a response from the server, it will always send a DHCP REQUEST message to the DHCP server that has previously assigned an IP address until the total lease expires.
- B. If the client receives a DHCP NAK message within the lease period, the client will immediately stop using this IP address and return to the initialization state, and re-apply for a new IP address
- C. The rebinding timer is 87.5% of the total lease period
- D. The lease renewal timer is 50% of the total lease period. When the "lease renewal timer" expires, the DHCP client must renew the IP address
Answer: A
NEW QUESTION 222
Configure ipv6 preference in IS-IS protocol view. The function of this command is to configure the priority of IPv6 routes generated by IS-IS protocol.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 223
The ipv6 enable topology standard is configured in the IS-IS protocol view. The meaning of this command is that IPv4 and IPv6 share the same topology.
- A. False
- B. True
Answer: B
NEW QUESTION 224
As shown in the figure, on the R1 router, network administrator A can control the path of traffic entering AS100 after modifying the MED value of the routing entry sent to R2 through the routing policy.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 225
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